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Tissot Seastar 1000 T120.417.17.051.00 Men's Watch – 45.5mm Black Dial Rubber
Ref. T120.417.17.051.00
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Stepping up in the same colour and case shape
A substantial dive-oriented chronograph, the Seastar 1000 runs to 45.5mm across and 12.8mm thick, with a 316L stainless steel case sitting on a 22mm black rubber strap fastened by a standard buckle. The black dial carries chronograph sub-dials measuring to 1/10th of a second across a 30-minute and 60-second range, alongside a date display and a battery end-of-life indicator. Hands and hour markers are lumed for low-light legibility. A unidirectional rotating aluminium bezel and sapphire crystal with double-sided anti-reflective coating complete the picture, with water resistance rated to 300 metres.
- Reference
- T120.417.17.051.00
- Brand
- Tissot
- Collection
- Seastar
- Case size
- 45.5mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Black
- Crystal
- Sapphire
- Bezel
- Unidirectional rotating
- Movement
- Quartz
- Calibre
- ETA G10.212
- Functions
- Chronograph, Date
- Water resistance
- 300m
- Bracelet / strap
- Rubber strap
- Strap colour
- Black
- Clasp
- Buckle
- Lume
- Luminous
- Retailer
- Watch Enclave
Additional specifications
- Origin
- Swiss made
Learn more about Tissot
Charles-Félicien Tissot and his son Charles-Émile founded the company in Le Locle in 1853, assembling gold pocket watches and, unusually for the time, exporting aggressively — Russia became a major market within a decade.
Tissot's history is a sequence of firsts achieved through willingness to try materials and ideas the establishment considered unserious. The first mass-produced pocket watch with two time zones came in 1853. The first anti-magnetic wristwatch in 1930. The Astrolon of 1971 was the first watch with a movement made largely of injection-moulded plastic, and it worked. The RockWatch of 1985 used Alpine granite for the case, followed by watches in wood and mother-of-pearl.
The T-Touch of 1999 was the most significant: a tactile sapphire crystal allowing the wearer to access altimeter, barometer, compass, thermometer, and chronograph by touching the glass, years before touchscreens were commonplace.
Tissot merged with Omega in 1930 and both became founding members of what is now the Swatch Group. Its position in the group is volume and accessibility — Swiss mechanical and quartz watches at prices most people can reach, with the Powermatic 80 movement offering an eighty-hour reserve at entry level.
The company has held timekeeping roles across cycling, basketball, motorsport, and fencing.
- 1853
- Founded in Le Locle by Charles-Félicien and Charles-Émile Tissot.
- 1930
- Merges with Omega; releases the first anti-magnetic wristwatch.
- 1971
- The Astrolon uses a plastic movement.
- 1985
- The RockWatch is cased in Alpine granite.
- 1999
- The T-Touch introduces a tactile sapphire crystal.
Also in 6 collections
This watch appears in the Tissot Seastar range (53), Stainless Steel Watches (3,088), Chronograph Watches (1,182), Watches 44mm and Over (798), Sports Watches (794) and Dive Watches (567).
Temporarily out of stock
Watch Enclave is not currently taking orders for this reference. Last listed as available on 8 August 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
A watch built to be worn hard and got wet.
Strengths
- 300m water resistance, rated for actual diving
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
- Sits in the lower half of Tissot's range as we list it
Worth knowing
- 45.5mm is a large watch with real presence
Tissot Seastar 1000 T120.417.17.051.00 alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | T120.417.17.051.00 | 96B432 | 1514267 |
|---|---|---|---|
| Price | £399 | £379 | £349 |
| Case size | 45.5mm | 43mm | 44mm |
| Water resistance | 300m | 200m | — |
| Movement | Quartz | Quartz | Quartz |
| Strap | Rubber strap | Silicone strap | — |
| This watch |
|
|
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Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 300m it is rated for swimming, snorkelling and recreational diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
Quartz, automatic and solar comparedIs it a men's or women's watch?
Listed as men's.
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